A Single 30-Minute Aerobic Exercise Can Improve Glucose Metabolism in Young Adults
A recent study found that a single 30-minute session of outdoor aerobic exercise, such as light jogging, significantly improves glucose metabolism in healthy, young adults.
Specifically, the exercise reduced fasting and 1-hour post-glucose load blood sugar levels the following day during an Oral Glucose Tolerance Test (OGTT). It also improved insulin sensitivity.
- Participants: 32 young, healthy, normal-weight or marginally overweight adults (average age 35, with 14 women and 18 men) who were sedentary or moderately active.
- Exercise Protocol: Participants completed an initial OGTT after 4 days of inactivity, followed by a second OGTT the day after a 30-minute light jogging session.
- Measurements: The researchers measured blood glucose levels, insulin sensitivity, and secretion using several indices, including the Matsuda index, OGIS index, and HOMA for insulin resistance and beta-cell function.
- Reduced Glucose Levels: After the exercise, 1-hour post-load glucose levels dropped significantly from 122.8 mg/dL to 111.8 mg/dL (P = .03).
- Lower Insulin Levels: Post-exercise insulin levels also decreased from 57.4 IU/mL to 43.5 IU/mL (P = .01).
- Improved Insulin Sensitivity: Significant improvements in insulin sensitivity were observed, marked by increases in the Matsuda and OGIS indices (P = .02 and P = .04, respectively) and a reduction in insulin resistance (P = .04).
- Beta-Cell Function: There was a trend toward improved beta-cell function, although it was not statistically significant (HOMA-B increased from 144.7 to 167.1).
The study suggests that even a single round of aerobic exercise can have a meaningful, positive impact on glucose metabolism and insulin sensitivity, which may help reduce the risk of type 2 diabetes (T2D) and cardiovascular disease.
This effect was seen within just 24 hours following the exercise session.
- The small sample size may limit the generalizability of the findings.
- C-peptide levels, which could provide further insight into insulin secretion were not measured in this study.
Conclusion:
The results highlight the potential of short, moderate-intensity exercise to significantly improve metabolic health, offering a simple and accessible way to reduce diabetes risk.
Source:
This study was led by Simona Moffa and Gian Pio Sorice and published in the Journal of Endocrinological Investigation. It was supported by grants from Università Cattolica del Sacro Cuore.
Read the original article: A Single Jog Can Improve Glucose Metabolism in Young Adults
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